Which one of these names for this buisness is better?

I personally do not like either of them. Most websites that start with a number like that people tend to have a negative response to, usually because they aren't legit. However if you are only going to choose between those two then go with 411, 911 makes no sense. 411 means information. We have a local paper that advertises stuff like that called "the entertainer". Maybe try Entertainer411.com ? I would start with a word either way, not numbers. Just a marketing thing.